fix problem with disable/enable IsoObject in play mode

Assets/IsoTools/Examples/Prefabs/Dragosha/Dungeon/TileA.prefab

@@ -38,8 +38,8 @@ Transform:
   m_PrefabParentObject: {fileID: 0}
   m_PrefabInternal: {fileID: 100100000}
   m_GameObject: {fileID: 180122}
-  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 2.2000008, y: -3.3, z: 1.3000001}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 2.1976166, y: -3.2986054, z: 3.299999}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children:
   - {fileID: 490734}
@@ -71,9 +71,9 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   _size: {x: 1, y: 1, z: 1}
-  _position: {x: -1, y: -2, z: 0}
-  _mode: 0
-  _cacheRenderers: 1
+  _position: {x: -3, y: 2, z: 0}
+  _renderersMode: 0
+  _cachedRenderers: 0
 --- !u!212 &21210794
 SpriteRenderer:
   m_ObjectHideFlags: 1

Assets/IsoTools/Scripts/Internal/Editor/IsoObjectEditor.cs

@@ -150,7 +150,7 @@ namespace IsoTools.Internal {
 
 		void DirtyTargetPositions() {
 			var iso_object = targets.Length == 1 ? target as IsoObject : null;
-			if ( iso_object && iso_object.IsActive() ) {
+			if ( iso_object && iso_object.IsActive() && !Application.isPlaying ) {
 				var position_prop = serializedObject.FindProperty("_position");
 				if ( position_prop != null && !position_prop.prefabOverride ) {
 					var last_value = position_prop.vector3Value;